That’s a huge problem with the whole idea of providing value to the business. Some people can show real metrics but a lot of us are several layers away from anything quantifiable so either you have nothing to show or you have to make up some bullshit metric as I often see in resumes.
Slightly off, but the whole "business value" in IT resumes is proper a US thing. Cross the border and you're good with just mentioning what you did, sans the (often imaginary) "impact".
